[people/ms/u-boot.git] / board / bmw / ns16550.h

/*
 * NS16550 Serial Port
 * originally from linux source (arch/ppc/boot/ns16550.h)
 * modified slightly to
 * have addresses as offsets from CONFIG_SYS_ISA_BASE
 * added a few more definitions
 * added prototypes for ns16550.c
 * reduced no of com ports to 2
 * modifications (c) Rob Taylor, Flying Pig Systems. 2000.
 * further modified to support the 8245 duart
 * modifications (c) Paul Jimenez, Musenki, Inc. 2001.
 */


struct NS16550 {
	unsigned char rbrthrdlb;	/* 0 */
	unsigned char ierdmb;		/* 1 */
	unsigned char iirfcrafr;	/* 2 */
	unsigned char lcr;		/* 3 */
	unsigned char mcr;		/* 4 */
	unsigned char lsr;		/* 5 */
	unsigned char msr;		/* 6 */
	unsigned char scr;		/* 7 */
	unsigned char reserved[2];	/* 8 & 9 */
	unsigned char dsr;		/* 10 */
	unsigned char dcr;		/* 11 */
};


#define rbr rbrthrdlb
#define thr rbrthrdlb
#define dll rbrthrdlb
#define ier ierdmb
#define dlm ierdmb
#define iir iirfcrafr
#define fcr iirfcrafr
#define afr iirfcrafr

#define FCR_FIFO_EN     0x01	/*fifo enable */
#define FCR_RXSR        0x02	/*reciever soft reset */
#define FCR_TXSR        0x04	/*transmitter soft reset */
#define FCR_DMS		0x08	/* DMA Mode Select */

#define MCR_RTS         0x02	/* Readyu to Send */
#define MCR_LOOP	0x10	/* Local loopback mode enable */
/* #define MCR_DTR         0x01    noton 8245 duart */
/* #define MCR_DMA_EN      0x04    noton 8245 duart */
/* #define MCR_TX_DFR      0x08    noton 8245 duart */

#define LCR_WLS_MSK 0x03	/* character length slect mask */
#define LCR_WLS_5   0x00	/* 5 bit character length */
#define LCR_WLS_6   0x01	/* 6 bit character length */
#define LCR_WLS_7   0x02	/* 7 bit character length */
#define LCR_WLS_8   0x03	/* 8 bit character length */
#define LCR_STB     0x04	/* Number of stop Bits, off = 1, on = 1.5 or 2) */
#define LCR_PEN     0x08	/* Parity eneble */
#define LCR_EPS     0x10	/* Even Parity Select */
#define LCR_STKP    0x20	/* Stick Parity */
#define LCR_SBRK    0x40	/* Set Break */
#define LCR_BKSE    0x80	/* Bank select enable - aka DLAB on 8245 */

#define LSR_DR      0x01	/* Data ready */
#define LSR_OE      0x02	/* Overrun */
#define LSR_PE      0x04	/* Parity error */
#define LSR_FE      0x08	/* Framing error */
#define LSR_BI      0x10	/* Break */
#define LSR_THRE    0x20	/* Xmit holding register empty */
#define LSR_TEMT    0x40	/* Xmitter empty */
#define LSR_ERR     0x80	/* Error */

/* useful defaults for LCR*/
#define LCR_8N1     0x03


volatile struct NS16550 *NS16550_init (int chan, int baud_divisor);
void NS16550_putc (volatile struct NS16550 *com_port, unsigned char c);
unsigned char NS16550_getc (volatile struct NS16550 *com_port);
int NS16550_tstc (volatile struct NS16550 *com_port);
void NS16550_reinit (volatile struct NS16550 *com_port, int baud_divisor);
Commit	Line	Data
71fc6c55 WD	1	/*
	2	* NS16550 Serial Port
	3	* originally from linux source (arch/ppc/boot/ns16550.h)
	4	* modified slightly to
6d0f6bcf	5	* have addresses as offsets from CONFIG_SYS_ISA_BASE
71fc6c55 WD	6	* added a few more definitions
	7	* added prototypes for ns16550.c
	8	* reduced no of com ports to 2
	9	* modifications (c) Rob Taylor, Flying Pig Systems. 2000.
	10	* further modified to support the 8245 duart
	11	* modifications (c) Paul Jimenez, Musenki, Inc. 2001.
	12	*/
	13
	14
bf9e3b38 WD	15	struct NS16550 {
	16	unsigned char rbrthrdlb; /* 0 */
	17	unsigned char ierdmb; /* 1 */
	18	unsigned char iirfcrafr; /* 2 */
	19	unsigned char lcr; /* 3 */
	20	unsigned char mcr; /* 4 */
	21	unsigned char lsr; /* 5 */
	22	unsigned char msr; /* 6 */
	23	unsigned char scr; /* 7 */
	24	unsigned char reserved[2]; /* 8 & 9 */
	25	unsigned char dsr; /* 10 */
	26	unsigned char dcr; /* 11 */
	27	};
71fc6c55 WD	28
	29
	30	#define rbr rbrthrdlb
	31	#define thr rbrthrdlb
	32	#define dll rbrthrdlb
	33	#define ier ierdmb
	34	#define dlm ierdmb
	35	#define iir iirfcrafr
	36	#define fcr iirfcrafr
	37	#define afr iirfcrafr
	38
bf9e3b38 WD	39	#define FCR_FIFO_EN 0x01 /fifo enable /
	40	#define FCR_RXSR 0x02 /reciever soft reset /
	41	#define FCR_TXSR 0x04 /transmitter soft reset /
	42	#define FCR_DMS 0x08 /* DMA Mode Select */
71fc6c55	43
bf9e3b38	44	#define MCR_RTS 0x02 /* Readyu to Send */
71fc6c55 WD	45	#define MCR_LOOP 0x10 /* Local loopback mode enable */
	46	/* #define MCR_DTR 0x01 noton 8245 duart */
	47	/* #define MCR_DMA_EN 0x04 noton 8245 duart */
	48	/* #define MCR_TX_DFR 0x08 noton 8245 duart */
	49
bf9e3b38 WD	50	#define LCR_WLS_MSK 0x03 /* character length slect mask */
	51	#define LCR_WLS_5 0x00 /* 5 bit character length */
	52	#define LCR_WLS_6 0x01 /* 6 bit character length */
	53	#define LCR_WLS_7 0x02 /* 7 bit character length */
	54	#define LCR_WLS_8 0x03 /* 8 bit character length */
	55	#define LCR_STB 0x04 /* Number of stop Bits, off = 1, on = 1.5 or 2) */
	56	#define LCR_PEN 0x08 /* Parity eneble */
	57	#define LCR_EPS 0x10 /* Even Parity Select */
	58	#define LCR_STKP 0x20 /* Stick Parity */
	59	#define LCR_SBRK 0x40 /* Set Break */
	60	#define LCR_BKSE 0x80 /* Bank select enable - aka DLAB on 8245 */
71fc6c55	61
bf9e3b38 WD	62	#define LSR_DR 0x01 /* Data ready */
	63	#define LSR_OE 0x02 /* Overrun */
	64	#define LSR_PE 0x04 /* Parity error */
	65	#define LSR_FE 0x08 /* Framing error */
	66	#define LSR_BI 0x10 /* Break */
	67	#define LSR_THRE 0x20 /* Xmit holding register empty */
	68	#define LSR_TEMT 0x40 /* Xmitter empty */
	69	#define LSR_ERR 0x80 /* Error */
71fc6c55 WD	70
	71	/* useful defaults for LCR*/
	72	#define LCR_8N1 0x03
	73
	74
bf9e3b38 WD	75	volatile struct NS16550 *NS16550_init (int chan, int baud_divisor);
	76	void NS16550_putc (volatile struct NS16550 *com_port, unsigned char c);
	77	unsigned char NS16550_getc (volatile struct NS16550 *com_port);
	78	int NS16550_tstc (volatile struct NS16550 *com_port);
	79	void NS16550_reinit (volatile struct NS16550 *com_port, int baud_divisor);